<template>
  <div class="user-info-head" @click="editCropper()">
    <img :src="options.img" title="点击上传头像" class="img-circle img-lg" />
    <el-dialog :title="title" v-model="open" width="800px" append-to-body @opened="modalOpened" @close="closeDialog">
      <el-row>
        <el-col :xs="24" :sm="12" :style="{ height: '350px' }">
          <vue-cropper
            ref="cropperRef"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            :outputType="options.outputType"
            @realTime="realTime"
            v-if="visible" />
        </el-col>
        <el-col :xs="24" :sm="12" :style="{ height: '350px', position: 'relative' }">
          <div class="avatar-upload-preview">
            <img :src="options.previews.url" :style="options.previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :md="2">
          <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
            <el-button>
              选择
              <el-icon class="el-icon--right"><Upload /></el-icon>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{ span: 1, offset: 2 }" :md="2">
          <el-button icon="Plus" @click="changeScale(1)"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :md="2">
          <el-button icon="Minus" @click="changeScale(-1)"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :md="2">
          <el-button icon="RefreshLeft" @click="rotateLeft()"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :md="2">
          <el-button icon="RefreshRight" @click="rotateRight()"></el-button>
        </el-col>
        <el-col :lg="{ span: 2, offset: 6 }" :md="2">
          <el-button type="primary" @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script setup>
  import 'vue-cropper/dist/index.css'
  import { VueCropper } from 'vue-cropper'
  import { uploadAvatarApi } from '@/api/common'
  import { debounce } from '@/utils/tools/function'
  import useUserStore from '@/store/modules/user'

  const userStore = useUserStore()
  const { proxy } = getCurrentInstance()

  const open = ref(false)
  const visible = ref(false)
  const title = ref('修改头像')
  const cropperRef = useTemplateRef('cropperRef')

  //图片裁剪数据
  const options = reactive({
    img: userStore.avatar, // 裁剪图片的地址
    autoCrop: true, // 是否默认生成截图框
    autoCropWidth: 200, // 默认生成截图框宽度
    autoCropHeight: 200, // 默认生成截图框高度
    fixedBox: true, // 固定截图框大小 不允许改变
    outputType: 'png', // 默认生成截图为PNG格式
    filename: 'avatar', // 文件名称
    previews: {} //预览数据
  })

  /** 编辑头像 */
  function editCropper() {
    open.value = true
  }

  /** 打开弹出层结束时的回调 */
  let resizeHandler = null
  function modalOpened() {
    visible.value = true
    if (resizeHandler) {
      resizeHandler = debounce(() => {
        refresh()
      }, 100)
    }
    window.addEventListener('resize', resizeHandler)
  }
  // 刷新组件
  function refresh() {
    cropperRef.value.refresh()
  }
  /** 覆盖默认上传行为 */
  function requestUpload() {}

  /** 向左旋转 */
  function rotateLeft() {
    cropperRef.value.rotateLeft()
  }

  /** 向右旋转 */
  function rotateRight() {
    cropperRef.value.rotateRight()
  }

  /** 图片缩放 */
  function changeScale(num) {
    num = num || 1
    cropperRef.value.changeScale(num)
  }

  /** 上传预处理 */
  function beforeUpload(file) {
    if (file.type.indexOf('image/') == -1) {
      proxy.$modal.msgError('文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。')
    } else {
      const reader = new FileReader()
      reader.readAsDataURL(file)
      reader.onload = () => {
        options.img = reader.result
        options.filename = file.name
      }
    }
  }

  /** 上传图片 */
  function uploadImg() {
    cropperRef.value.getCropBlob(data => {
      let formData = new FormData()
      formData.append('file', data, options.filename + '.' + options.outputType)
      uploadAvatarApi(formData).then(response => {
        open.value = false
        options.img = res.url
        userStore.avatar = options.img
        proxy.$modal.msgSuccess('修改成功')
        visible.value = false
      })
    })
  }

  /** 实时预览 */
  function realTime(data) {
    options.previews = data
  }

  /** 关闭窗口 */
  function closeDialog() {
    options.img = userStore.avatar
    options.visible = false
  }
</script>

<style lang="scss" scoped>
  .user-info-head {
    position: relative;
    display: inline-block;
    height: 120px;
  }

  .user-info-head:hover:after {
    content: '+';
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    color: #eee;
    background: rgba(0, 0, 0, 0.5);
    font-size: 24px;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: pointer;
    line-height: 110px;
    border-radius: 50%;
  }
</style>
